Add Yahoo as a preferred source to see more of our stories on Google. We all recognize smoke alarms and sirens, but according to Reddit, there are plenty of other sounds that should make you stop in ...

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The covalent radius (a measure of how large individual atoms are) shows different trends if you are moving across a period or down a group. A comparison of the relative covalent radii of atoms is ...

Abstract: A wideband pattern-reconfigurable cone antenna employing liquid-metal reflectors is presented. The proposed pattern-reconfigurable antenna consists of a metal cone as the main radiators and ...